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Lanthanum phosphate (LaPO4) nanostructures with different morphologies were prepared by a facile solution–precipitation process. The effect of different reaction conditions on the morphology of nanostructures was studied. When the molar ratio of La3+ : H3PO4was around 1 : 2, 1 : 20, 1 : 100, and 1 : 200, four different morphologies, such as near-spherical, snowflake-like, star-shaped, lens-like nanostructures and short nanorods, were obtained, respectively. Meanwhile, similar shapes developed when the molar ratio of H3PO4to ionic surfactants, such as SDS and CTAB, was varied. In addition, Eu3+doped and Ce3+/Tb3+co-doped LaPO4nanostructures showed morphology evolution similar to undoped LaPO4nanostructures. The optical properties of these doped LaPO4were also characterized. [ABSTRACT FROM AUTHOR]

This paper presents the preparation of crystalline mesoporous titanias using furfuryl alcohol as a polymerizable solvent and titanium(IV) butoxide as a titania source. In the synthesis, furfuryl alcohol (FA) initially stabilized titanium(IV) butoxide through alcohol exchange reaction, and then highly crosslinked poly(furfuryl alcohol) (PFA), formed via thermal polymerization of FA, served as a temporary barrier to confine titania crystallization. The crystalline mesoporous titanias were finally obtained by removing PFA and organic surfactant. X-ray diffraction (XRD), Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and N2-sorption were used to characterize the crystalline mesoporous titanias. The characterizations showed that the crystalline mesoporous titanias prepared under different conditions possessed pore sizes of 11.1−23.6 nm and Brunauer−Emmett−Teller (BET) surface areas of 26.1−109.9 m2/g. The pore size and surface area of crystalline mesoporous titania increased when the ratio of titanium(IV) butoxide to furfuryl alcohol decreased. [ABSTRACT FROM AUTHOR]

ZIF-8 films were successfully prepared on a flexible nylon substrate with a contra-diffusion synthesis method, and gas permeation experiments indicated that the films were continuous and compact. [ABSTRACT FROM AUTHOR]